MessagePackPolimorhpicProperty-code.java

@MessagePackPolimorhpicType("type")
public abstract class PlanNode
{
    ...

    public static final Deserializer type = new PolymorphicDeserializer()
            .add("error", ErrorNode.class)
            .add("engine", EngineNode.class);
}

public class ErrorNode extends PlanNode
{
}
 
public class EngineNode extends PlanNode
{
}

public class MyCustomNode extends PlanNode
{
    static {
        PlanNode.type.add("my_custom", MyCustomNode.class);
    }
}